21132626 has 8 divisors (see below), whose sum is σ = 31722240. Its totient is φ = 10558548.

The previous prime is 21132623. The next prime is 21132659. The reversal of 21132626 is 62623112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21132623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515 + ... + 6521.

It is an arithmetic number, because the mean of its divisors is an integer number (3965280).

Almost surely, 2^21132626 is an apocalyptic number.

21132626 is a deficient number, since it is larger than the sum of its proper divisors (10589614).

21132626 is a wasteful number, since it uses less digits than its factorization.

21132626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7768.

The product of its digits is 864, while the sum is 23.

The square root of 21132626 is about 4597.0236022888. The cubic root of 21132626 is about 276.4720009319.

Adding to 21132626 its reverse (62623112), we get a palindrome (83755738).

The spelling of 21132626 in words is "twenty-one million, one hundred thirty-two thousand, six hundred twenty-six".